<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  
  <style>
  
    * {
      margin: 0;
      padding: 0;
    }
  
    ul {
      list-style: none;
    }
  
    .wrapper {
      width: 1000px;
      height: 475px;
      margin: 0 auto;
      margin-top: 100px;
    }
  
    .tab {
      border: 1px solid #ddd;
      border-bottom: 0;
      height: 36px;
      width: 320px;
    }
  
    .tab li {
      position: relative;
      float: left;
      width: 80px;
      height: 34px;
      line-height: 34px;
      text-align: center;
      cursor: pointer;
      border-top: 4px solid #fff;
    }
  
    .tab span {
      position: absolute;
      right: 0;
      top: 10px;
      background: #ddd;
      width: 1px;
      height: 14px;
      overflow: hidden;
    }
  
    .products {
      width: 1002px;
      border: 1px solid #ddd;
      height: 476px;
    }
  
    .products .main {
      float: left;
      display: none;
    }
  
    .products .main.selected {
      display: block;
    }
  
    .tab li.active {
      border-color: red;
      border-bottom: 0;
    }
    
  </style>
  
</head>
<body>

<div class="wrapper">
  <ul class="tab">
    <li class="tab-item active">国际大牌<span>◆</span></li>
    <li class="tab-item">国妆名牌<span>◆</span></li>
    <li class="tab-item">清洁用品<span>◆</span></li>
    <li class="tab-item">男士精品</li>
  </ul>
  <div class="products">
    <div class="main selected">
      <a href="###"><img src="images/guojidapai.jpg" alt=""/></a>
    </div>
    <div class="main">
      <a href="###"><img src="images/guozhuangmingpin.jpg" alt=""/></a>
    </div>
    <div class="main">
      <a href="###"><img src="images/qingjieyongpin.jpg" alt=""/></a>
    </div>
    <div class="main">
      <a href="###"><img src="images/nanshijingpin.jpg" alt=""/></a>
    </div>
  </div>
</div>

</body>
</html>

<script src="jq/jquery-1.12.2.js"></script>
<script>

  /**
   * 鼠标移动到分类上，切换对应的商品
   * 索引对应
   */

  $(function () {
    //先找到所有的分类，注册鼠标移入事件
    $(".tab-item").mouseover(function () {
      //获取索引
      var index = $(this).index();
//      console.log(index);
      //修改tab栏的样式
      //当前鼠标移入的tab栏添加属性
      $(this).addClass("active");
      //先把所有的样式属性去除，通过修改类名的方式
      $(this).siblings().removeClass("active");
      //把所有的都隐藏，直接把类名去除
      $(".selected").removeClass("selected");
      //根据索引找到对应的图片，然后显示；直接通过修改类名来控制显示
      $(".main").eq(index).addClass("selected");
    })
  });
  
</script>